Consult the content editor slides at the top of the page for more examples.Some other best practices include: 1. There are three main reasons why you should be using alt text. It’s better to leave the ALT tag blank (ALT=””) then to enter a text description that’s not useful or is redundant. Also called "alt tags" and "alt descriptions," alt text is the written copy that appears in place of an image on a webpage if the image fails to load on a user's screen. Describe the image. See the Pen Here’s an example of an image we used in a recent Yola blog post: This is the alt text we used for this image: As you can see the alt text describes what this image is. If you feel that you need text that deviates from the style, formatting options provided by online content editors should allow you to update the style for that text. However, alt text is typically “behind the scenes,” whereas captions are visible to anyone accessing the page. Do also be sure also to keep ALT text as short and succinct as possible. in a fancy font with shading) have an alt text of just the text and don't describe the rendering; an image of a VCR-style play button is typically "play" instead of "right pointing triangle", and images of purely cosmetic images typically have empty alt text. In this case, the alternative text should say something like "Harvard University logo.". Let's look at some examples of appropriate alternative text, using the same Harvard University logo in different contexts. Icons: alt text for icons should be the equivalent to the information intended by the icon, such as “Download PDF” or “Visit our Facebook Page” Images as Links: If the image is being used to link to another page, the alt text should describe what will happen when the image is clicked (rather than what it looks like). When composing image descriptions, it may seem difficult to decide what to include. Twitter users can add alt text by enabling these settings here. These include: I talk about some of these details in my post on texting etiquette and low vision here. Imagine that some prose has been provided to describe—in this case—the division of energy sources for Romania’s electricity production: “When we consider energy consumption trends farther east in Europe, however, we might consider the Carpathian nation of Romania as an example. Determining if the image presents content and what that content is can be much more difficult. The field is usually named “Alt-text”, “Alternative text” or “Alt”, but in some interfaces it’s called “Image description” or something similar. If the image contains meaningful text, the alternate text should contain that text. “Search the Card Catalog" is much more useful than "Photo of a collection of books and other reading materials scattered on a library table". When the object is an image, it is scaled. Images with complex information: If the image is a chart, diagram, or illustration, consider how to convey the information contained in the image using both the alt-text and the adjacent page text. ALT tags are often misused, mostly people overuse them. If the image is a light blue button with rounded edges and dark red text with the word "Submit," the alt text should be simply: alt="submit" Don't worry about describing the non-essential visual aspects of the button's appearance. Completing the Romanian picture, we find that other energy sources make up the remaining 2%.”. Skip to section navigation. Remember, ALT text should describe the content of the image and nothing more. Listening to a web page with a screen reader takes a lot longer than traditional methods, so don’t make the surfing experience painful for screen reader users with bloated and unnecessary ALT text. Search engines also index alt text information and consider it a factor when determining search engine ratings. So if you have 4 images of the same camera strap on the page, the alt text could be: gives more details than alt text and allows someone to learn more about what is in an image that goes beyond alt text Alt text gives the user the most important information while image descriptions provide further detail. In a WYSIWYG editor, it is possible to upload an image of some text (let's say, "delicious pancakes") and insert it into the page with alternative text that matches the text exactly: One disadvantage here is that screen readers will, in some contexts, read the alternative text with "graphic" appended, and you might not want the user to know that the text is really an image. The alt text for the image should still describe the general content of the image. All the correct information is there, but it’s hidden among a lot of unnecessary verbosity. Alternative text for informative images needs to provide the same information as the image. 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